One day, Yukiko took a drive with her secret lover and her son. The car accident took her left leg and her son’s life. Even after this tragedy, Yukiko and her husband Kawamura has maintained their married life, outwardly. They didn't talk to each other, literally no verbal communication. However, the silence between them was somehow funny in a way. Because every day, they had lunch at the same diner pretending they are total strangers to each other.